Bug: AOT doesn't work with interfaces

[lyf6lyf]

trafficstars

Description

My code is like below

    public class Parent { }
    public sealed class Child : Parent { }
    public static class Example
    {
        public static Child GetChild() {  return new Child(); }
    }

But it doesn't compile because "error CsWinRT1005: Exporting unsealed types is not supported in CsWinRT, please mark type Parent as sealed" I use interfaces as workaround, and change my code to

    public interface IParent {}
    public interface  IChild : IParent {}
    internal partial class Parent : IParent {}
    internal partial class Child : Parent, IChild {}
    public sealed class Example
    {
        public static IChild GetChild() { return new Child(); }
    }

And it works well.

Next, I enable AOT following https://github.com/MichalStrehovsky/CppPublishAotReference When I run the code, I see below error: Exception thrown at 0x00007FFC28D2837A (KernelBase.dll) in CppConsoleApp.exe: WinRT originate error - 0x80004002 : 'Failed to create a CCW for object of type 'AuthoringDemo.Parent' for interface with IID 'F4D7DFF0-F052-5B09-8FB3-7B563C3D0E1C': the specified cast is not valid.'. Exception thrown at 0x00007FFC28D2837A (KernelBase.dll) in CppConsoleApp.exe: WinRT originate error - 0x80004002 : 'Failed to create a CCW for object of type 'AuthoringDemo.Child' for interface with IID '58D127C1-2630-5E63-8877-42BC48D395E8': the specified cast is not valid.'.

Steps To Reproduce

1. clone https://github.com/lyf6lyf/CsWinRT/commit/e05e5897303e334e1a310bbada886b6a806eddca
2. build and run \src\Samples\AuthoringDemo\CppConsoleApp\main.cpp

Expected Behavior

The code can run successfully.

Version Info

CsWinRT version: 2.2.0

DotNet version: net8.0-windows10.0.22621.0, net9.0-windows10.0.22621.0

Additional Context

No response